In fact, many people will have such questions. We know why pipes are called pipes, and elbows also know why they are called elbows. And the product is worthy of the number. So the question is, why is the flange called the flange? In fact, this question is not so difficult to understand. Many words in modern Chinese are foreign words, such as sofa, and they generally respect the principle of direct transliteration of foreign languages, and so is the way of flange.
Flange, in translation, actually means "flange": an edge on a structural or mechanical part that protrudes perpendicular to the axis of the part. From the English word flangee. According to everyone's established habits, any connecting parts that are bolted at the periphery of two planes and closed at the same time are generally called "flanges".
Flanges are the interconnected parts between shafts and are used for the connection between pipe ends; they are also used as flanges on the inlet and outlet of equipment for the connection between two equipment, such as reducer flanges. Flange connection or flange joint refers to a detachable connection in which flanges, gaskets and bolts are connected to each other as a set of combined sealing structures, also known as flange flanges or flanges.
Under normal circumstances, our commonly used pipeline flanges are used in pairs. Wire flanges can be used for low-pressure pipelines, and welded flanges can be used for pressures above four kilograms. Add a gasket between the two flanges and fasten them with bolts. Different pressure flanges have different thicknesses, and they use different bolts. There are many detailed explanations involved here, which should be determined in detail according to the requirements of the construction process.
Franz's many brothers: The standards for flanges, flat welding flanges, and socket welding flanges are different. The applicable occasions are also different. In addition, the butt welding flange is that the pipe diameter and wall thickness of the interface end are the same as the pipes to be welded, and are welded in the same way as the two pipes. The flat welding flange is a concave table that is slightly larger than the outer diameter of the pipe at the interface, and the pipe is inserted and welded inside. Butt welding has better welding performance and less corrosion.
Flat welding flanges are generally used for low and medium pressure pipelines, butt welding flanges are used for the connection of medium and high pressure pipelines, butt welding flanges are generally at least PN2.5MPa, butt welding is used to reduce stress concentration. Features of various Jianzhen flanges: Socket welding flange is suitable for small diameter, high pressure and high temperature pipeline connection.
Flat welding has a boss like butt welding, a groove is opened on the boss, and then the pipe is inserted into it for welding. Socket welding means that there is no boss, and a groove is directly opened on the flange body, just like a hole in a blind flange, and then a groove.
